/Engine/Source/Editor/UnrealEd/Classes/Factories/FbxSkeletalMeshImportData.h
This function add the last import content type to the asset registry which is use by the thumbnail overlay of the skeletal mesh
virtual void AppendAssetRegistryTags ( [TArray](API\Runtime\Core\Containers\TArray)< [FAssetRegistryTag](API\Runtime\CoreUObject\UObject\UObject\FAssetRegistryTag) > & OutTags )